DAS family
DAS_w229_alcUltrasoundDamaged
Automatic lane change unavailable
What does the DAS_w229_alcUltrasoundDamaged alert mean?
Automatic lane change (ALC) is initiated by the driver but ALC is unavailable due to Autopilot electronic control unit (ECU) detecting damage to ultrasonic sensors.
What you'll see in your Tesla
- Automatic lane change unavailable
- Ultrasonic sensors not communicating
What triggers it
Autopilot ECU detects damage to one or more ultrasonic sensors while ALC is initiated.
When it clears
Ultrasonic sensors are replaced and Autopilot ECU no longer detects any damage to ultrasonic sensors.
Potential impact
Automatic lane change (ALC) feature is unavailable.
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
Semitruck
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